Brian Barton
Polluted oxygen is a gas resource in the space-colony simulation game Oxygen Not Included, developed by Klei. It is dirty, unfiltered air that spawns naturally in swamp biomes. Breathing polluted oxygen is not harmful to duplicants, but it does spread Slimelung and Food Poisoning germs and causes the Yucky Lungs debuff, increasing the air consumption rate and causing coughing. It also causes food nearby to rot at a faster rate. To filter polluted oxygen, players can use air deodorizers, which convert polluted oxygen into oxygen and clay, or Pufts, creatures that can breathe polluted oxygen and excrete slime. Other methods include using air pumps and filters, venting polluted oxygen into space, or converting it into liquid oxygen through cooling and reheating.
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What You'll Learn
Place deodorizers near sources of polluted oxygen
Deodorizers are an effective way to filter polluted oxygen (pO2) and convert it to oxygen (O2). They are a decontamination structure, designed to reduce the threat of diseases by filtering the air. Deodorizers are best placed near structures that produce polluted oxygen, such as outhouses, wash basins, and the Algae Distiller and Compost. They are also useful for mopping up pockets of carbon dioxide (CO2), minimising the need for dupes to backtrack for air.
Deodorizers are especially useful near sources of polluted oxygen, such as outhouses and wash basins. They have a range of two to three tiles and can collect polluted oxygen from both sides of walls, making them highly effective at cleaning the air. Liquids do not block this reach, so placing a liquid tile between the deodorizer and the polluted oxygen creates a perfect seal. They are also useful for dealing with polluted water, which naturally converts to polluted oxygen over time. An array of deodorizers over an open pool of polluted water can (very slowly) convert it into oxygen, producing clay as a by-product.
Deodorizers require a filtration medium such as sand, which needs to be periodically refilled by duplicants. They also consume a minimal amount of power, only 5 Watts, making them an energy-efficient solution. It is important to note that deodorizers do not remove germs from the air, but the germs will eventually die off once the oxygen has been cleaned.
To use deodorizers effectively, it is important to incorporate them into the design of your base. For example, placing them along main thoroughfares ensures that any gases approaching the base are screened. It is also a good idea to place them near the top of exploratory shafts that are full of polluted oxygen. For a standard-sized room, one deodorizer on each side or one at the entrance should be enough to prevent leaking.
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Vent polluted oxygen into space
Polluted oxygen is a dirty, unfiltered air resource that can be found in the Swamp Biome. It is breathable but can cause the Yucky Lungs debuff, which increases the rate of air consumption and causes coughing. It also spreads Slimelung and Food Poisoning germs and causes food to rot faster.
To get rid of polluted oxygen, you can use deodorizers, which convert PO2 into O2. Place these near sources of polluted oxygen, such as slime or polluted water, or around your base. You can also use air pumps to transport polluted oxygen to a filter and then into a room with deodorizers or a storage tank. Another option is to cool and condense it into liquid oxygen and then heat it back up.
If you have a lot of polluted oxygen, you may want to vent it into space. However, this is generally not recommended unless you have a specific setup or are running out of sand. It is more common to seal the vents or use the polluted oxygen for other purposes, such as powering steam turbines or feeding Pufts, which eat polluted oxygen and produce slime and mushrooms.
To effectively manage polluted oxygen, it is important to identify and address the source. Storing slime and polluted dirt underwater and properly disposing of and storing polluted water can help reduce the amount of polluted oxygen in your base.
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Use Pufts to roam your base
Pufts are non-aggressive critters that can breathe in certain gases and excrete them as their solid counterparts. The basic Puft ingests Polluted Oxygen and excretes Slime with 95% efficiency. The Slime that Pufts produce can be converted to Algae at an Algae Distiller, or used to farm Dusk Caps.
To use Pufts to roam your base, you can build a stable room with Polluted Water on the floor and fill it with plain Pufts. The water will off-gas Polluted Oxygen, feeding the Pufts. It may be easier to keep the population of Pufts higher by keeping a separate Puft Prince stable to produce Puft eggs. With Spaced Out, a single Sublimation Station running continuously was enough to feed just under 8 Pufts.
It is important to note that Pufts can only achieve their maximum conversion rate if their mobility is limited. They typically inhale twice, then rise to the ceiling and excrete 1.5 to 2.5 kg of their corresponding element every 10 seconds. They will not produce droppings if they do not have room to rise to the ceiling. This can be addressed by giving them a pneumatic door as a roof, allowing production while preventing access.
The main benefit of using Pufts is their ability to produce slime, which can be used for farming mushrooms. Mushrooms require less water compared to other options like bristle blossoms, and they do not need dirt like sleetwheat. Additionally, Pufts pair well with Morbs, as they will consume the Polluted Oxygen that the Morb produces.
While Pufts can help with Polluted Oxygen, it is worth noting that they are not the only solution. Other methods to manage Polluted Oxygen include using deodorizers, venting it into space, or cooling and condensing it into liquid oxygen and then heating it back up.
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Cool and condense polluted oxygen into liquid oxygen
Polluted oxygen can be converted to liquid oxygen by cooling it down to its condensation point and then reheating it. This process can be achieved using an installation involving Thermo Regulators. Thermo Regulators, via the hydrogen, remove energy from and condense the polluted oxygen. The number of Thermo Regulators needed can be calculated using the rate at which you want to condense the polluted oxygen.
The following steps outline a system for cooling and condensing polluted oxygen into liquid oxygen:
First, ensure that only polluted oxygen is input into the system—other gases may cause issues. Use gold for most of the buildings, especially the Thermo Regulator and Liquid Pump. For the metal wall, tungsten can be used, and Diamond Tempshift Plates can be used to ensure fast energy transfer.
Next, monitor the temperatures of the Petroleum in the left room and the Hydrogen in the middle room. Enable the Thermo Regulators when the temperature of the Petroleum falls below -45 °C / -49 °F to heat it and protect against freezing. Enable the Thermo Regulators when the temperature of Hydrogen rises above -200 °C / -328 °F to maintain a stable temperature for condensing polluted oxygen.
The room on the left should contain Petroleum, which has a high thermal conductivity to prevent overheating and smooth out temperature differences. Its low freezing point also ensures that the Liquid Oxygen will not freeze it. The room with Hydrogen should have slightly less pressure than 20 kg, or else the vents may block and the system may malfunction.
By following these steps and adjusting the number of Thermo Regulators based on your desired rate of conversion, you can effectively cool and condense polluted oxygen into liquid oxygen in Oxygen Not Included.
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Use air pumps to transport polluted oxygen to a filter
To filter polluted oxygen in Oxygen Not Included, one strategy is to use air pumps to transport the polluted oxygen to a filter. Here's a detailed guide on how to execute this strategy effectively:
Identify the Source of Polluted Oxygen
Before implementing any filtration methods, it's crucial to identify the source of polluted oxygen in your base. Find the areas where polluted oxygen is being generated, such as slime biomes or polluted water sources. This will help you target your filtration efforts effectively.
Install Air Pumps
Place air pumps strategically around your base, focusing on areas with high concentrations of polluted oxygen. These air pumps will be responsible for drawing in the polluted air and transporting it to the filtration system. Ensure that the pumps are placed at various heights and horizontal locations to maximize their reach.
Transport Polluted Oxygen to a Filter
Use a network of gas pipes to connect the air pumps to a central filtration unit. Gas pipes are essential for transporting the polluted oxygen from the pumps to the filter. Ensure that the pipes are properly connected and directed towards the input of the filter.
Choose an Appropriate Filter
There are different types of filters available in the game, such as gas filters or deodorizers. Deodorizers are a popular and cost-effective option for removing polluted oxygen. They work by sucking in polluted oxygen and slowly converting it into clean oxygen. Place deodorizers near sources of polluted oxygen, such as next to polluted water reservoirs or in rooms with high concentrations of polluted oxygen.
Filter and Store Polluted Oxygen
Once the polluted oxygen reaches the filtration unit, it will be separated into different gases. The standard green output of the filter will release clean, non-polluted oxygen, which can be distributed back into your base. The orange output of the filter will contain the polluted oxygen that was filtered out. You can choose to send this polluted oxygen to a storage tank or a separate room with additional deodorizers for further cleaning.
Optimize Power Efficiency
To reduce power consumption, it is recommended to filter gases in order of their prevalence in your source. Filter oxygen first, followed by polluted oxygen, and then other gases. Additionally, consider installing a gas pipe element sensor and a gas shut-off connected via automation to further optimize power usage.
By following these steps and utilizing air pumps to transport polluted oxygen to a filter, you can effectively improve the air quality in your base and ensure a healthier environment for your dupes in Oxygen Not Included.
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Frequently asked questions
Air Deodorizers and Pufts can be used to remove polluted oxygen. Deodorizers produce oxygen and clay from polluted oxygen using a filtration medium. Pufts can also breathe polluted oxygen and excrete slime.
Yes, you could let Pufts roam your base, or use debug tools to delete the deodorizer. You could also vent your polluted oxygen into space.
Deodorizers suck in polluted oxygen and slowly transform them into oxygen.
Place deodorizers in all the places that stuff can settle, as well as anywhere that produces polluted oxygen. You can also place them in the wild, but it's recommended to place them along your main thoroughfares so that any gases approaching your base are screened.
Polluted oxygen is the primary vector of transmission for Slimelung germs, and can just as easily spread Food Poisoning germs. Breathing too much polluted oxygen causes the Yucky Lungs debuff, which increases the air consumption rate and causes coughing. It also causes food nearby to rot at a faster rate.
